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shield.c revision 1.1 
      1 /*
      2  * Copyright (c) 1980 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 static char sccsid[] = "@(#)shield.c	5.5 (Berkeley) 6/1/90";
     36 #endif /* not lint */
     37 
     38 # include	"trek.h"
     39 # include	"getpar.h"
     40 
     41 /*
     42 **  SHIELD AND CLOAKING DEVICE CONTROL
     43 **
     44 **	'f' is one for auto shield up (in case of Condition RED),
     45 **	zero for shield control, and negative one for cloaking
     46 **	device control.
     47 **
     48 **	Called with an 'up' or 'down' on the same line, it puts
     49 **	the shields/cloak into the specified mode.  Otherwise it
     50 **	reports to the user the current mode, and asks if she wishes
     51 **	to change.
     52 **
     53 **	This is not a free move.  Hits that occur as a result of
     54 **	this move appear as though the shields are half up/down,
     55 **	so you get partial hits.
     56 */
     57 
     58 struct cvntab Udtab[] =
     59 {
     60 	"u",		"p",			(int (*)())1,		0,
     61 	"d",		"own",			0,		0,
     62 	0
     63 };
     64 
     65 shield(f)
     66 int	f;
     67 {
     68 	register int		i;
     69 	char			c;
     70 	struct cvntab		*r;
     71 	char			s[100];
     72 	char			*device, *dev2, *dev3;
     73 	int			ind;
     74 	char			*stat;
     75 
     76 	if (f > 0 && (Ship.shldup || damaged(SRSCAN)))
     77 		return;
     78 	if (f < 0)
     79 	{
     80 		/* cloaking device */
     81 		if (Ship.ship == QUEENE)
     82 			return (printf("Ye Faire Queene does not have the cloaking device.\n"));
     83 		device = "Cloaking device";
     84 		dev2 = "is";
     85 		ind = CLOAK;
     86 		dev3 = "it";
     87 		stat = &Ship.cloaked;
     88 	}
     89 	else
     90 	{
     91 		/* shields */
     92 		device = "Shields";
     93 		dev2 = "are";
     94 		dev3 = "them";
     95 		ind = SHIELD;
     96 		stat = &Ship.shldup;
     97 	}
     98 	if (damaged(ind))
     99 	{
    100 		if (f <= 0)
    101 			out(ind);
    102 		return;
    103 	}
    104 	if (Ship.cond == DOCKED)
    105 	{
    106 		printf("%s %s down while docked\n", device, dev2);
    107 		return;
    108 	}
    109 	if (f <= 0 && !testnl())
    110 	{
    111 		r = getcodpar("Up or down", Udtab);
    112 		i = (int) r->value;
    113 	}
    114 	else
    115 	{
    116 		if (*stat)
    117 			(void)sprintf(s, "%s %s up.  Do you want %s down", device, dev2, dev3);
    118 		else
    119 			(void)sprintf(s, "%s %s down.  Do you want %s up", device, dev2, dev3);
    120 		if (!getynpar(s))
    121 			return;
    122 		i = !*stat;
    123 	}
    124 	if (*stat == i)
    125 	{
    126 		printf("%s already ", device);
    127 		if (i)
    128 			printf("up\n");
    129 		else
    130 			printf("down\n");
    131 		return;
    132 	}
    133 	if (i)
    134 		if (f >= 0)
    135 			Ship.energy -= Param.shupengy;
    136 		else
    137 			Ship.cloakgood = 0;
    138 	Move.free = 0;
    139 	if (f >= 0)
    140 		Move.shldchg = 1;
    141 	*stat = i;
    142 	return;
    143 }
    144